Bubbles will now disappear on pop and reappear after a set time controlled by a var in BP_Bubble.
Min and max delay between bubble pop and next bubble getting highlighted can now be controlled using vars in BP_BubbleGrid.
There are now materials for bubbles in Content/Materials (default and highlighted). They are a bit transparent and glow slightly (although in the dark you can't see the transparency).
The scene is now darker and more simple to see bubbles better.